Active learning
为什么不把判端加载在for循环里面。也可以判断，啊，根据i+1的值；来判端，分别执行不同的语句；
1 回答
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>图片展示--侧边显示详细信息</title>
<style>
div, ul, li, dl, dt, dd, img, a {
margin: 0;
padding: 0;
}
ul, li, dl, dt, dd {
list-style: none;
}
img {
border: 0;
width: 300px;
}
.demo {
margin: 0 auto;
overflow: hidden;
padding: 0 34px;
}
.orginImg li {
float: left;
margin-right: 5px;
position: relative;
margin-bottom:10px;
}
.orginImg li a {
display: block;
border: 2px solid #ccc;
}
.orginImg li div {
position: absolute;
top: 0;
left: 100%;
z-index: 22;
background: #ccc;
width: 305px;
height: 170px;
border: 2px solid #F00;
display: none;
}
.orginImg li div dl{
color:#fff;
font-weight:bold;
padding:10px;
}
.orginImg li div dl dt{
text-align:center;
}
.orginImg li div dl dd{
text-indent:2em;
}
</style>
</head>
<body>
<div class="demo" >
<ul class="orginImg" id="orginImg">
<li>
<a href="http://imooc.com"><img src="http://img1.sycdn.imooc.com//52fd84630001d22603000170.jpg" /></a>
<div>
<dl>
<dt>学会html5 绝对的屌丝逆袭</dt>
<dd>本课程由浅入深，逐步推进，以示例为主线，详细完整地介绍HTML5的新功能与新特征</dd>
</dl>
</div>
</li>
<li>
<a href="http://imooc.com"><img src="http://img1.sycdn.imooc.com//52fd84630001d22603000170.jpg" /></a>
<div>
<dl>
<dt>学会html5 绝对的屌丝逆袭</dt>
<dd>本课程由浅入深，逐步推进，以示例为主线，详细完整地介绍HTML5的新功能与新特征</dd>
</dl>
</div>
</li>
<li>
<a href="http://imooc.com"><img src="http://img1.sycdn.imooc.com//52fd84630001d22603000170.jpg" /></a>
<div>
<dl>
<dt>学会html5 绝对的屌丝逆袭</dt>
<dd>本课程由浅入深，逐步推进，以示例为主线，详细完整地介绍HTML5的新功能与新特征</dd>
</dl>
</div>
</li>
<li>
<a href="http://imooc.com"><img src="http://img1.sycdn.imooc.com//52fd84630001d22603000170.jpg" /></a>
<div>
<dl>
<dt>学会html5 绝对的屌丝逆袭</dt>
<dd>本课程由浅入深，逐步推进，以示例为主线，详细完整地介绍HTML5的新功能与新特征</dd>
</dl>
</div>
</li>
<li>
<a href="http://imooc.com"><img src="http://img1.sycdn.imooc.com//52fd848d00017baa03000170.jpg" /></a>
<div>
<dl>
<dt>圆角水晶按钮制作</dt>
<dd>网页中的圆角按钮和宽度自适应按钮就这么轻松制作</dd>
</dl>
</div>
</li>
<li>
<a href="http://imooc.com"><img src="http://img1.sycdn.imooc.com//52fd84b00001e9b803000169.jpg" /></a>
<div>
<dl>
<dt>导航条菜单的制作</dt>
<dd>30分钟教你轻松制作出各种形式的网站导航条菜单</dd>
</dl>
</div>
</li>
</ul>
</div>
<script type="text/javascript">
var lis = document.getElementById("orginImg").getElementsByTagName("li");
for (var i = 0; i < lis.length; i++) {
lis[i].onmouseover = showDetail;
lis[i].onmouseout = hideDetail;
if(i%3==2)
{
lis[i].getElementsByTagName("div")[0].style.left='auto';
lis[i].getElementsByTagName("div")[0].style.right='100%';
}
}
var lastLi;
lastLi = lis[lis.length - 1];
lastLi.getElementsByTagName("div")[0].style.left = ' auto ';
lastLi.getElementsByTagName("div")[0].style.right = '100%';
function showDetail() {
this.getElementsByTagName("div")[0].style.display = 'block';
}
function hideDetail() {
this.getElementsByTagName("div")[0].style.display = 'none';
}
</script>
</body>
</html>
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